Burner for natural gas.



No. 858,189. PATENTED JUNE 25, 1907.

H. M. LEPS.

BURNER FOR NATURAL GAS.

APPLICATION FILED NOV. 24, 1806.

[NVE/VTOR Al/omey UNITED STATES PATENT OFFICE.

HENRY Ml LEPS, or GRAFTON, WEST VIRGINIA.

BURNER FOR NATURAL GAS.

, T at whmn it may concern:

. burners, and particularly to natural gas burners where that fluid is used or employed as a fuel for heating purposes.

The use of gas as a fuel to develop the heat used for power and manufacturing purposes is preferred to coal or other fuel because of its being cleaner, more efficient as a heating 3 agent, more easily handled and, consequently,

more economical as a fuel. In order, however, to burn gas economically it is necessary to provide sufficient oxygen for the complete combustion of the gas; to provide means for obtaining a perfectly intimate mixture of the oxygen with the fuel gas before combustion takes place; .and to provide suitable means for regulating the fuel supply to accord with the variations in the heat required.

The usual methods of burning gas now practiced are to either project the gas into the furnace or combustion chamber and ad- 'Init air into the chamberin quantity suffi cient for its combustion, or tomix the gas with air before admitting the mixture to the combustion chamber. T he. first method mentioned lacks efficiency because the burning mixture of air and gas lacks intimacy and therefore more air than is necessary for coniplete combustion must be admitted and the overplus actsto reduce the temperature. The second method, mixing the air and gas prior to admission to the combustion chamber, has been extensively used in connection with complicated and expensive mixers in which the currents of gas and of air are more or less interfered with, thereby-reducing their efliciency or requiring the air to be admitted under pressure to project the mixture into the combustion chamber.

M y invention has for its objects to provide an improved form of burner in which the pressure of the gas isutilized as the projective power or force to feed the fuel to the combustion chamber and to so act on the air as to draw it in and intimately mix with the same in proper quantity to produce perfect com-I bustion; to provide a, burner in which there are no parts or mechanism In the hne of the an or gas currents to Interfere with their free Specification of Letters Patent.

I Application filed November 24, 1906. Serial No. 344,942.

Patented June 25, 1907.

and straight passage; to provide for the adjustment of the internal gas opening from the outside without shutting off or otherwise interfering with the gas; and to provide a simple form of burner consisting of but two main parts, easy of operation, durable, and

comparatively inexpensive, arid adapted to accomplish the object of obtaining perfect combustion without other power than that contained in the gas under its initial or line.

pressure. VV'th these objects in view my invention consists of the parts and'combinations of parts hereinafter described and claimed.

- In the drawing is illustrated a longitudinal central section through my improved burner.

Referring to the drawing A represents an outer cylindrical shell which comprises an enlarged section a, and a reduced section 6 formed from a single casting. The section a is formed with an interior annular recess 0 which, when the parts ofthe burner are assembled, forms the upper half of an annular gas chamber B. One of the end walls, (1, of the recess tapers to the bore of the reduced section b. The other end wall, 6, of the recess is abruptly curved to the bore of section a, and said bore is screw threaded, as at f, for a part of its length for-a purpose to be described. At the end of the shell A an annular recessg is formed to receive a packing h, and agland i, the exterior of the shell being screw threaded, as at j, to receive an adjusting nut m which acts upon the gland'i to force the packing tightly in the recess g and formed through the shell into the gas chamberto receive the pipe 0 which leads from the source of supply of gas.

C represents the air conducting tube. This tube is exteriorly threaded, as at Z, to enable it to be screwed into the shell A, and is contracted near its inner end to form an annular recess, as at p, which forms the other half of the gas chamber B, when the parts are assembled, and its end is tapered or conical in shape,

as at s, to conform to the shape of the wall,

d, of the recess 0 of the shell. The contraction' of the tube C in forming the annular re cess p therein reduces the bore diameter of said tube at the point named to the diameter of the bore of section b of the shell, which section forms the mixing chamber. This construction provides a straight clear passage for the air adjacent the point where it IIO meets the incoming gas and the contraction of this part of the tube bore causes the volume of air therein to be accelerated by the pressure of the gas and thus meet the gas with greater force and to mix more intimately therewith. The end of the tube is formed'with a lug t to support a studu to which is hung a gate D, which is held by a winged nut E. The gate may be swung to one side to uncover more or less the open end of the tube so as to regulate the quantity-of air entering the tube and may be fixed in its adjusted position by the nut E.

F represents a series of spokes screwed into the tube C in order to provide a convenient means for adjusting the tube in the shell in order to regulate the escape of gas from chamber B through the tapered opening between the tube and shell.

It will be noticed that the gas is delivered to the combustion chamber at an angle thereto which crosses the current of incoming air, thus more eiliciently mixing therewith, and that the latter is brought into contact with the air at its initial or line pressure, thereby giving power to draw in the proper amount of air for complete combustion, and that there are no obstacles of any sort to the straight passage of the air through the tube .or the gas from its chamber to the combustion chamber;

Having thus described my invention what I claim as new and desire to secure by Letters Patent is:

1. A gas burner comprising a cylindrical shell having an interior annular recess and a reduced cylindrical section, the latter forming a mixing chamber, a cylindrical air tube having its discharge end contracted in diameter to the diameter of the bore of the reduced section of the shell and having an exterior recess combining with the interior recess of said shell to form an annular gas chamber, and means for adjusting said air tube to regulate the escape of the gas from the gas chamber.

2. A gas burner comprising a cylindrical shell having an interior annular recess and a reduced cylindrical section, the latterforming a mixing chamber, a cylindrical air tube adjustably arranged in said shell and formed with an exterior annular recess which combines with the recess in the shell to form a gas chamber, an oblique annular escape opening for said gas chamber to deflect the gas at an angle to and across the incoming air, means for adjusting the air tube to regulate the size of said opening, and means for controlling the quantity of air admitted to the air tube.

A. gas burner comprising a cylindrical shell having an interior annular recess and a reduced cylindrical section, the latter form ing a mixing chamber, aicylindrical air tube having an exterior annular recess adapted to co-act with the recess in the shell to form a gas chamber, the bore of said tube being reduced for a portion of its length at one end, an oblique annular escape opening for said gas chamber to deflect the gas across the end of the air tube, means for adjusting the air tube to regulate the escape of gas from the chamber, an inlet pipe for said chamber, and adjustable means for forming a gas tight joint between the shell and the air tube.

In testimony whereof, I affix my signature, in the presence of two witnesses.

HENRY M. LEPS. l/Vitnesses:

G. H. A. KUNsT, A. W. BUTT. 

